The thermochemical energy storage systems company was originally founded in 2020 as Redoxblox, but CEO Pasquale Romano argued the company’s shift from developmental technology to commercialization required a simpler moniker.
Read the entire story at San Diego Business Journal
Redoxblox, a leader in thermochemical energy storage (TCES) on a mission to electrify the world with technology that shifts the power dynamic, today announced its rebrand to Tempo. The new identity marks the company’s transition from technology development to the commercial scaling of its breakthrough electrified heat platform.
The rebrand, developed in partnership with renowned creative agency Red Antler, aligns Tempo’s strategic identity with its unique ability to meet the rigorous demands of heavy industry. The name Tempo is a nod to three core pillars of the company’s value proposition: Temperature leadership, the time-shifting of energy, and the pace of both continuous industrial heat delivery and rapid innovation.
“As we move from technical validation toward large-scale commercial rollout, our brand must reflect the scale of the challenge we are solving,” said Pasquale Romano, CEO of Tempo. “Tempo represents our ability to deliver the extreme temperatures industry requires while giving operators the power to time-shift electricity use, sourcing energy when it is cheapest and most available. Most importantly, it speaks to pace: the continuous, uninterrupted delivery of heat that modern manufacturing demands, and the speed at which we are innovating to meet the challenge.”
Heavy industries, including cement, metals, chemicals, and food and beverage, account for roughly 24% of global energy consumption. Most of this energy is currently produced by burning fossil fuels to generate high-temperature heat. Tempo replaces this combustion by delivering a continuous stream of superheated air meeting a wide range of industrial requirements, from 100°C to 1,200°C.
The Tempo platform is designed to optimize the economics of the modern electrical grid. By offering ultra-rapid charging that can reach full capacity in as little as four hours, Tempo allows facilities to capture low-cost, intermittent renewable energy or off-peak power. This time-shifting capability enables operators to hedge against volatile energy markets while maintaining a reliable, high-temperature heat supply.
The Tempo platform is a containerized, high-density system using safe, earth-abundant materials. Key advantages include:
The company’s momentum is supported by a premier group of climate investors, including Breakthrough Energy Ventures, Khosla Ventures, Prelude Ventures, New System Ventures, and Imperative Ventures. Tempo continues to gain international recognition for its potential to transform the industrial energy landscape.
For more information on Tempo’s industrial heat solutions, visit the newly launched website at www.tempoenergy.com.
Based in San Diego, California, Tempo develops thermochemical energy storage (TCES) systems designed for energy-intensive industries. The platform enables industrial operators to shift energy use over time by sourcing power when it is most cost-effective and enables the electrification of high-temperature industrial heat at a cost advantage to using fossil fuels. By storing electricity thermochemically, the system delivers a continuous stream of combustion-free, high temperature air at up to 1,200°C.
Tempo is backed by leading climate and energy investors, including Breakthrough Energy Ventures, Khosla Ventures, and Prelude Ventures.
For more information, visit www.tempoenergy.com.
Read the entire story at ess-news.com
Tempo, a thermochemical energy storage company, has been named on Cleantech Groups 2025 Global Cleantech 100. This annual list, now in its 16th year, showcases the most promising cleantech companies making significant contribu ons to sustainable innova on. The complimentary report introduces the innovators advancing groundbreaking technologies and business models to solve energy and environmental problems.
Tempo supports industrial decarbonization and long duration on grid-scale storage via thermochemical energy storage – a new class of energy storage. These systems have higher energy density than LithiumIon, making electricity cost-competitive with natural gas in the industrial heat space, a sector that accounts for approximately 30% of global GHG emissions.
“2025 will be remembered as a transformative year for cleantech. The bar has gone up for what kind of level of poten al novelty, uniqueness, and cost improvements might be attractive,” said Richard Youngman, CEO of Cleantech Group. “The Global Cleantech 100 highlights innovators who are building the foundation for a sustainable and economically viable future.”
“It’s an honor to receive such prestigious recognition from the Cleantech Group for our commitment to developing cost-effective energy storage solutions,” said Pasquale Romano, CEO of Tempo. “It’s not just about climate. We must bring to market solutions that are reliable, emissions-free, and affordable.”
Featured companies will be recognized at the Cleantech Forum North America, taking place January 27-29 in San Diego, CA. This event offers participants the opportunity to connect with many of the innovators on the list, along with many other rising stars. The Forum will showcase the latest trends, groundbreaking technologies, and foster collaboration within the clean tech community.
About Tempo
Located in San Diego, Tempo is pioneering a new class of low-cost thermochemical energy storage systems (TCES) designed to accelerate industrial decarboniza on and address long duration energy storage needs for the grid. The company’s TCES units store energy both chemically and as heat at very high temperatures that can be discharged continuously or as needed directly into industrial processes or as an energy source for electricity genera on. The system can be fast charged when electricity prices are low or during surplus renewables generation and discharged as needed. Tempo is backed by Prelude Ventures, Khosla Ventures, Breakthrough Energy Ventures, Imperative Ventures, and New System Ventures.
About Cleantech Group
Cleantech® Group is a research-driven company that helps corporates, public sector, investors and others, iden fy, assess, and engage with the innova ve solu ons and opportuni es that are related to the world’s massive, and growing, environmental and climate challenges. Our insights and exper se are delivered to clients all over the world through our Research, Consul ng, and Events. We have been the leading authority on global cleantech innova on since 2002.
For more information, visit www.tempoenergy.com.
Cleantech Group
Carole Jacques
Director of Marketing
carole.jacques@cleantech.com
+1 347-225-6542
A coalition of leading energy technology companies has announced the formation of the Thermal Battery Alliance, the first industry group of its kind. The member companies include Antora Energy, Electrified Thermal Solutions, RedoxBlox, and Rondo Energy, which currently focus on the industrial heat sector, and Fourth Power, which currently focuses on grid storage. This strategic collaboration is set to drive transformative change in the industrial and power sectors and establish thermal batteries at the forefront of the clean manufacturing and electrification revolutions.
Thermal batteries are a breakthrough American technology that increases the competitiveness of the U.S. industrial manufacturing base and bolsters the country’s grid reliability while lowering energy costs for companies and consumers. Thermal batteries charge with low cost, off-peak intermittent power and store that energy as heat. This heat can be delivered around-the-clock to drive industrial operations, or converted on-demand into electricity to power factories and meet grid needs.
Critically, this new battery asset class relies on abundant materials without many of the supply chain hurdles faced by other types of batteries. Thermal batteries also avoid key safety challenges associated with other battery storage technologies, such as fire risk.
The Thermal Battery Alliance will:
The new industry coalition is committed to showcasing the vital role that thermal batteries play in a thriving and secure energy and industrial manufacturing base. The Thermal Battery Alliance plans a series of reports, including an analysis of thermal batteries’ grid benefits and a study of job creation impacts. These publications will underscore the ways thermal batteries lower energy costs for U.S. manufacturers and ratepayers while enabling industrial products made-in-America to be more globally competitive.
“The formation of the Thermal Battery Alliance marks a pivotal moment in the energy sector. Thermal battery technologies unlock cost-effective industrial electrification; lower electricity prices; and economic growth. Together, our member companies are committed to ensuring that thermal batteries play a major role in rapid industrial and power sector transformation,” said Katherine Hamilton, Interim Executive Director of the Thermal Battery Alliance.
The market potential for thermal batteries in the industrial heat and grid sectors is massive. Industrial heat accounts for 20% of global energy demand and 9% of U.S. emissions. Existing thermal battery technologies store energy at temperatures high enough to address 99% of U.S. industrial heat demand using clean, low-cost, surplus power. Additionally, by 2040, experts expect up to $3 trillion will be invested in long-term grid storage systems that will be able to store and provide as much as 2.5 terawatts (TW) of power worldwide.
“Thermal batteries are uniquely positioned to help solve the two biggest challenges in the transition to clean industry: making electrified heat definitively cheaper than heat from existing energy sources and growing the supply of renewable electricity to meet demand,” said Jeffrey Rissman, Senior Director at Energy Innovation Policy & Technology and author of Zero-Carbon Industry. “It’s exciting to see innovative companies in the thermal battery industry joining forces to raise awareness of this breakthrough technology and speed its adoption. The result will be a more secure and more competitive energy system and manufacturing base.”
About Antora Energy
Antora builds and deploys thermal batteries to power always-on industrial operations with low-cost renewable energy. Factory-built in the United States, Antora’s modular thermal batteries deliver reliable heat and power, enabling industrial facilities of any size to decarbonize predictably and profitably. Antora is electrifying global industry while supporting U.S. manufacturing jobs, curbing local air pollution, and accelerating the path to a reliable zero-emission grid. To learn more, visit www.antora.com and follow the company on LinkedIn and Twitter.
About Electrified Thermal Solutions
Electrified Thermal Solutions (Electrified Thermal) is pioneering the future of zero-carbon industrial heat. Developed at MIT, the electrically and thermally conductive bricks at the heart of Electrified Thermal’s Joule Hive™ thermal battery (JHTB) represent a step change improvement in electric heating element technology in terms of high temperature performance and durability. The company’s JHTB generates, stores, and delivers unprecedented near-flame temperature heat (up to 1,800°C / 3,275°F), offering the most cost-effective, clean alternative to fossil fuels.
With industrial heat processes responsible for over 20% of global greenhouse gas emissions, Electrified Thermal is creating the commercially viable decarbonization pathway for industries such as power, cement, mining, steel and metals, chemicals, and food processing. The Boston-based company is on track to commercialize the JHTB by 2026, accelerating the transition to decarbonized industrial processes and helping industries meet their net-zero goals.For more information, please visit www.electrifiedthermalsolutions.com.
About Fourth Power
Fourth Power makes reliable, cost-effective renewable energy an available resource for utilities and power generators, 24/7. By combining thermal energy storage with thermophotovoltaic (TPV) cells, Fourth Power turns the light emitted from heated carbon blocks into electricity that is dispatchable to the grid in seconds. The company’s extremely high-temperature system (2400°C) ensures maximum efficiency with readily available materials, offering the lowest-cost option for grid decarbonization. Fourth Power has engineered a highly flexible battery that is built to customer specifications and grows with the grid as renewable energy deployment expands. For more information on how Fourth Power has put the sun in a box to make clean, reliable energy more accessible, visit gofourth.com.
About RedoxBlox
RedoxBlox has pioneered a new class of energy storage – Thermochemical energy storage (TCES). RedoxBlox TCES modules store both heat and chemical energy through a metal oxide redox reaction, enabling energy densities on par with Li-Ion, but at a fraction of the cost. RedoxBlox TCES units have undergone several years of daily cycling with no degradation, and with temperatures delivered above 1100°C and up to 1500°C for the entire discharge, making the solution perfectly suited to replace natural gas in industrial applications. Learn more at redoxblox.com
About Rondo Energy
Rondo is purpose-built for industrial facilities: Its Heat Batteries are constructed from proven, durable materials and are designed for seamless integration with existing industrial equipment and processes. Whether deployed as a drop-in replacement for retiring fossil-fueled heating equipment or as a resilient complement to existing systems, Rondo requires no disruptive changes to customers’ operations.
Rondo currently operates the world’s highest temperature, highest efficiency commercial energy storage system, at Calgren Renewable Fuels in Pixley, California. Working with its partner Siam Cement Group (SCG), Rondo is expanding the production capacity of its storage media from its current 2 GWh/yr to an industry-leading 90 GWh per year. Rondo Energy is headquartered in Alameda, California. Learn more at rondo.com.
Katherine Hamilton, Interim Executive Director
Katherine is serving as Interim Executive Director of the Thermal Battery Alliance. She has decades of experience in energy storage, including during her ten year tenure at Virginia Power (now Dominion) where she designed power grids and assisted utility customers in accessing thermal energy storage tariffs. In the intervening years, Katherine led policy for the Energy Storage Association, worked to pass Long Duration Energy Storage legislation in Congress, and served as a technology expert on the Governor of Virginia’s energy storage task force to identify ways in which the Commonwealth could meet its storage targets. As an international policy expert, Katherine was an original and longtime host of The Energy Gang podcast. Katherine has led several councils of the World Economic Forum as a global policy and technology thought leader and is currently a Senior Executive in Clean Power and Electrification. She served as Vice Chair of the board of Greentown Labs, with start-up hubs in Somerville, MA and Houston, TX and currently serves as a Non-Executive Director at Smarter Grid Solutions and an Independent Director at Peak Power. Katherine studied electrical engineering at Northern Virginia Community College and holds degrees from Cornell University and the Sorbonne. Katherine was previously profiled and listed on the #Solar100 board by kWh Analytics and received a Cleanie Award as Entrepreneur of the Year.
Email Katherine at: katherine@38northsolutions.com
Follow Katherine on Bluesky: @cleangridview.bsky.social
Connect with Katherine on LinkedIn
SAN DIEGO, California – RedoxBlox, a leader in energy storage solutions, today announced it was awarded $8.9M from the California Energy Commission (CEC) and $6.7M from the U.S. Department of Energy (DOE). These grants follow the company’s $9.4M Series A financing led by Khosla Ventures for a total of $25 million to support demonstrations of RedoxBlox’s cuttingedge thermochemical energy storage (TCES) technology, which delivers zero-carbon electricity and heat.
RedoxBlox is at the forefront of high-temperature TCES systems with a mission to decarbonize two critical areas of the economy: industrial heat and renewable energy storage for the grid. The company’s innovative high-temperature thermochemical battery boasts energy densities comparable to lithium-ion batteries at a fraction of the cost. This advancement enables electrification of industrial heat for the difficult-to-decarbonize sectors including – cement, steel, food and beverage, refining and chemicals manufacturing. It also enables more renewable electricity sources such as solar and wind to come onto the electrical grid through ultra-low-cost energy storage.
RedoxBlox’s Co-Founder and CTO, Dr. Joerg Petrasch, said, “Our goal is simple: use electrification and thermochemical energy storage to compete as a zero-carbon replacement for natural gas. We have proven the science. Our focus now is to scale up to commercially relevant sizes. Funding from the DOE and CEC across two large markets and the partnerships with our customers across multiple industrial sectors are key enablers.”
In partnership with the University of California, San Diego (UCSD) and the Electric Power Research Institute (EPRI), the CEC selected RedoxBlox to pioneer long-duration energy storage solutions. Hosted by UCSD, the project will leverage RedoxBlox’s technology to power a turbogenerator, providing up to 24 hours of energy storage capacity.
Similarly, the DOE’s Industrial Efficiency and Decarbonization Office selected RedoxBlox for a first-of-its-kind, industrial-scale TCES, conducted in partnership with Dow and EPRI. This application will showcase the decarbonization of industrial steam at the Dow West Virginia plant through electrification using long-duration TCES. Both projects mark a pivotal step towards the decarbonization of industrial heat and grid storage at scale.
The RedoxBlox storage module features a vessel filled with a proprietary and abundantly available, low-cost metal oxide material. To charge, renewable electricity heats the metal oxide pellets from 1000-1500°C, triggering a chemical reaction that releases oxygen and stores heat in the form of chemical energy. Later, when stored energy is needed, air is directed through the module and the metal oxide consumes oxygen to reverse the reaction and release heat to the air. Hot air from the RedoxBlox module can then deliver heat to an array of industrial processes or to a gas turbine to generate electricity, thus serving as a drop-in replacement for natural gas. RedoxBlox is uniquely positioned to use the existing, massive natural gas-powered industrial infrastructure and replace natural gas with renewables-based heat – allowing significant reduction in capital needs for deployment of RedoxBlox technology for both industrial heat and grid storage.
In addition to Khosla Ventures, RedoxBlox is backed by top climate technology firms, including Breakthrough Energy Ventures (BEV). BEV led the company’s Seed round and participated in its Series A fundraise.
“The RedoxBlox TCES technology is a promising discovery in materials science and energy storage technology,” said Carmichael Roberts, BEV. “Paired with renewable energy resources, this technology aims to be cost competitive with natural gas for industrial heat applications. We’re looking forward to continuing to support the RedoxBlox team as they develop a cheaper, zero-carbon alternative to natural gas.”
Based in San Diego, California, Tempo develops thermochemical energy storage (TCES) systems designed for energy-intensive industries. The platform enables industrial operators to shift energy use over time by sourcing power when it is most cost-effective and enables the electrification of high-temperature industrial heat at a cost advantage to using fossil fuels. By storing electricity thermochemically, the system delivers a continuous stream of combustion-free, high temperature air at up to 1,200°C.
Tempo is backed by leading climate and energy investors, including Breakthrough Energy Ventures, Khosla Ventures, and Prelude Ventures.
For more information, visit www.tempoenergy.com.
Many of the world’s hardest-to-decarbonize industries face a similar challenge: how to obtain the white-hot heat their operations need — without using fossil fuels.
Tempo, a San Diego-based startup that landed $31 million in venture investment on Wednesday, says it has found a clever way to achieve this task: using the power of chemical reactions to store energy at 1,500 degrees Celsius for hours at a time.
Read more at Canary Media
Redoxblox is pioneering a new class of low-cost thermochemical energy storage systems (TCES) designed to accelerate industrial decarbonization and address long duration energy storage needs for the grid. The company’s TCES units store energy both chemically and as heat at high temperatures, allowing for continuous or on-demand discharge for industrial processes or electricity generation. The system can fast charge when electricity prices are low or during periods of surplus renewables generation.
Today, 95% of industrial heat is provided by fossil fuels, which accounts for 30% of global carbon emissions. Decarbonizing this sector has been historically challenging due to a lack of affordable emissions-free alternatives. With a conversion efficiency comparable to lithium-ion batteries, higher energy density, and direct high temperature air discharge, Redoxblox provides the first reliable, cost-competitive solution to effectively use electricity as an alternative to fossil fuels. The system also offers space efficient, grid-scale long duration energy storage, enabling intermittent renewables to meet baseload needs.
The company also announces the appointment of a new CEO, Pasquale Romano, formerly President and CEO of ChargePoint and currently Member of The President of the United States’ National Infrastructure Advisory Council (NIAC). Romano will lead the company through its next phase of growth, expanding into key industrial heat and long duration grid scale storage markets.
“Decarbonization depends on widespread adoption of cost-competitive alternatives to fossil fuels for industrial heat applications that address the time-varying nature of electricity demand and fluctuating renewable generation. Our goal is to address the density, cycle life, reliability, efficiency, and cost requirements to enable the world to decarbonize without economic compromise,” said Romano. “Decarbonization has to be a natural side effect of utilizing cost-competitive technologies to meet the world’s energy needs.”
The company’s Series A funding follows grants from the California Energy Commission (CEC) and the U.S. Department of Energy (DOE). Redoxblox was selected by the CEC for a project to demonstrate the ability to provide 24 hours of electricity storage capacity in collaboration with UC San Diego and the Electric Power Research Institute (EPRI). Similarly, the DOE’s Industrial Efficiency and Decarbonization Office chose Redoxblox for an industrial-scale thermochemical energy storage project, partnering with Dow Chemical and EPRI to decarbonize steam production at Dow’s West Virginia plant. Both initiatives represent significant strides toward decarbonizing industrial heat and grid storage at scale.
Redoxblox’s technology offers several advantages over traditional energy storage. The storage modules are built with stable, long-lasting, non-toxic, non-flammable, and recyclable materials that can operate at temperatures up to 1500°C. After extensive cycle testing, the material proved capable of supporting mission critical industrial applications and as a reliable energy store for the grid. A single unit can store up to 20 MWh of energy at 95% round trip efficiency. Multiple units can be combined to meet the energy requirements at large facilities and can charge in as little as two hours. The system is designed to integrate seamlessly into existing industrial processes, allowing businesses to adopt without significant alterations to how their business works.
“Redoxblox is tackling one of the toughest sectors to decarbonize, industrial heat,” said Gabriel Kra, Managing Partner at Prelude Ventures. “They’ve accomplished what once seemed impossible: creating an electrical alternative to natural gas that is affordable, easy to adopt, and charges more quickly than other solutions. We’re excited to support them as they continue to scale and bring this solution to market.”
About Tempo
Located in San Diego, Tempo is pioneering a new class of low-cost thermochemical energy storage systems (TCES) designed to accelerate industrial decarbonization and address long duration energy storage needs for the grid. The company’s TCES units store energy both chemically and as heat at very high temperatures that can be discharged continuously or as needed directly into industrial processes or as an energy source for electricity generation. The system can be fast charged when electricity prices are low or during surplus renewables generation and discharged as needed. Tempo is backed by Prelude Ventures, Khosla Ventures, Breakthrough Energy Ventures, Imperative Ventures, and New System Ventures. For more information, visit www.tempoenergy.com.
About Prelude Ventures
Prelude Ventures is a climate-focused venture capital firm that invests in and supports early-stage startups with the greatest potential to mitigate climate change. For over a decade, Prelude Ventures has sought out purpose-driven founders and provided the capital and expertise needed to build the next generation of category-defining businesses that will reshape our global economy for the greater good of people and the planet. Located in San Francisco, Prelude Ventures has approximately $2 billion under management.
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